1.Sally----Beijing for Shanghai and-----there ever since.You

1.Sally____Beijing for Shanghai and_____there ever since.You can go and pay her a visit on your way to Hangzhou.（A)
A.has left;worked
B.left;worked
C.has left;had worked
D.left;has worked
2.Did you have a good time last night?
Yes,thank you.I appreciated ____to the concert.(C)
A.to be invited
B.being invitied
C.to have been invited
D.having been invited
3.Each of the students,working hard at his or her lesson,_____to go to university.
So do I.(C)
A.hope
B.hopes
C.hoping
D.hoped
DDB括号里是我一开始选的答案,关键讲一下正确答案的理由.